US4079851A - Composite plastic container - Google Patents

Composite plastic container Download PDF

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Publication number
US4079851A
US4079851A US05/718,689 US71868976A US4079851A US 4079851 A US4079851 A US 4079851A US 71868976 A US71868976 A US 71868976A US 4079851 A US4079851 A US 4079851A
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US
United States
Prior art keywords
layers
outer layer
liner
inner layer
layer
Prior art date
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Expired - Lifetime
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US05/718,689
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English (en)
Inventor
Emery I. Valyi
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National Can Corp
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Individual
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Filing date
Publication date
Priority claimed from US05/375,824 external-priority patent/US4013748A/en
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Publication of US4079851A publication Critical patent/US4079851A/en
Assigned to NATIONAL CAN CORPORATION reassignment NATIONAL CAN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: VALYI, EMERY I.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3008—Preforms or parisons made of several components at neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3012—Preforms or parisons made of several components at flange portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3016—Preforms or parisons made of several components at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/302—Preforms or parisons made of several components at bottom portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3064—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical

Definitions

  • This invention relates to improvements in the manufacture of composite containers and the like of the type wherein the containers are made by an injection blow molding process wherein a preformed liner is placed upon the core, before injection of an outer plastic layer to form a composite parison which is subsequently expanded by internal pressure into the desired form in the manner customary in injection blow molding, the liner and the injected portion of the parison being held at a temperature appropriate for the desired deformation.
  • the invention relates to the production of a novel and improved composite article, consisting of at least two layers of plastic having different properties.
  • the inner layer may exhibit high resistance to permeation by gases, or solvents, while the outer layer exhibits high mechanical strength at low cost.
  • a preformed liner is placed over a core and a layer of plastic is pressure molded therearound. Care is taken in the course of the injection molding step not to entrap any air between the liner and the injected layer.
  • the molding apparatus is provided with suitable vents arranged to permit any air entrapped between the liner and the core, or between the liner and the plastic to be progressively vented as the injection proceeds.
  • the liner itself is shaped so as to tend to remain in full contact with the core during the injection step and may have a shape at its open end capable of being imbedded in the pressure molded layer so as to seal the parts against subsequent entrance of air between the liner and the plastic.
  • the process is preferably carried out under conditions that provide greater constriction of the pressure molded layer than that of the liner, particularly during cooling of both layers after expansion.
  • the injected layer and preformed liner form a composite parison which is introduced into a blow mold and expanded in unison in said blow mold to form the composite container of the present invention.
  • FIG. 1 is an axial section through a parison mold showing a liner and neck mold embodying the invention
  • FIG. 2 is a broken sectional view of the neck forming area of a parison mold showing a further embodiment of the invention
  • FIG. 3 is a transverse section taken on the line 3-3 of FIG. 2;
  • FIG. 4 is a broken axial section of a portion of the parison and core illustrating an undesirable air bubble between the liner and the core;
  • FIG. 5 is a partial section of a composite parison showing the manner of sealing the liner in the plastic layer
  • FIG. 6 is an axial section showing the blow core in blow position within the blow mold and hollow article in the blow mold cavity
  • FIG. 7 shows the container of the present invention.
  • a pressure molding injection assembly 10 in FIG. 1 is provided to supply hot, flowable plastic under pressure for molding the parison 16 in the parison mold 11 and around core 12 which may be a blow core.
  • Sleeve 13 is provided around a portion of core 12, as a continuation of the latter and to form with neck mold 14 the open end or neck of the container to be molded.
  • a liner 15 Prior to introducing core 12 into parison mold 11 and prior to filling the parison mold with hot plastic by means of the pressure molding assembly 10, a liner 15 is applied to blow core 12.
  • the liner 15 is provided at its open end with an outwardly extending flange 17 which is disposed in an annular recess 18 in the neck mold 14.
  • the air contained within that cavity or between the liner and the core prior to the introduction of plastic from the pressure molding assembly 10 is compressed and forced toward the area of the neck mold 14 as the mold cavity is progressively filled.
  • the degree of such compression depends upon the presence and size of openings through which the air may escape.
  • the flange 17 of the liner 15 which is adapted to cover and protect the neck and upper rim 19 of the container to be made, may cover substantial portions of the clearance between neck mold 14 and core 12 and its surrounding sleeve 13.
  • that clearance i.e., the difference in dimension between the mating surfaces of neck mold 14 and sleeve 13 can be made sufficient to allow for air escape without the plastic entering therein and thereby clogging the clearance.
  • the clearance may become ineffective and air tend to be trapped fortuitously and at random locations in the mold.
  • any air bubble entrapped between the liner 15 and the pressure molded plastic layers continues to exert pressure between the two layers of plastic in excess of atmospheric pressure and thereby the two layers will tend to separate, at times rapidly and excessively.
  • the air trapped between the core 12 and the liner 15 may produce the bubble 20, as indicated in exaggerated form in FIG. 4, which bubble insulates liner 15 locally from the core, rendering it less deformable than the rest of the liner; it also leaves that portion of the liner unsupported against the pressure of the oncoming plastic.
  • the liner may be damaged or ruptured and the air below the bubble 20 may be randomly displaced, but not removed.
  • the core 12 and the liner 15 are designed to have closely matching surfaces that cause the liner to be pressed into even better conformance with the core as the plastic enters the parison mold, as for example, by means of matching tapered surfaces, the taper being preferably in excess of 71/2°.
  • the neck mold 14 is provided with a plurality of passage 21 which extend axially of the neck mold and communicate with the annular recess 18 near its outer periphery.
  • Such passages 21 may be spaced around the periphery of the neck mold as required. These passages serve as vents for any air which is forced along the parison mold from the space between the sleeve 15 and the core 12, or the space between the sleeve 15 and the plastic.
  • the flange 17 is sufficiently flexible to permit such air to pass outwardly through the vents 21.
  • Additional vent means for the air trapped between the sleeve 15 and the core 12 may be provided by suitable clearance between the neck mold 14 and the sleeve 13 of the core 12, or by scoring or grooving the contacting surfaces in the manner which is known in the art.
  • the air is progressively vented and the liner is progressively conformed to the core during the injection step.
  • the flange 17 is adhered to or sealed to the end surface of the rim 19 of the plastic layer.
  • the flange 17 may be provided with a downwardly extending lip 17a which is embedded in and sealed to the rim 19 of the article as indicated in FIG. 5.
  • the sleeve 13a is provided with a shoulder 25 and a correspondingly enlarged peripheral portion 26 which is tapered outwardly and is adapted to seat in the correspondingly tapered peripheral portion 27 of the neck ring 14a.
  • the flange 17 of the liner engages the shoulder 25 which forms an end enclosure for the mold cavity.
  • the sleeve 13a may be provided with a plurality of passages 30 which are peripherally displaced therearound and terminate at the shoulder 25 to communicate with the space between the liner 15 and the core 12.
  • a series of passages 31 are provided in the neck ring 14a in a position to communicate with the space below the flange 17 so as to vent the air which may be trapped by the plastic layer 16.
  • the removal of the air may be facilitated by connecting the passages 30 or 31, or both sets of passages to a suitable source of suction (not shown). It is also to be understood that air may escape in any space between the flared surfaces 26 and 27, which may be scored or grooved if desired.
  • the passages 31 in the sleeve 13a may be omitted if sufficient venting area is obtained between said surfaces as this area is not obstructed in the form shown in FIGS. 2 and 3 by the flange 17 of the liner.
  • the flange may be held spaced from the surface of the shoulder 25 as by means of radial ribs 32, as shown in FIG. 3.
  • the spaces between ribs 32 may be connected by an annular passage formed by grooves 33 in the ribs 32.
  • the arrangement of ribs 32 at the location shown is intended to serve merely as an example illustrating one means of providing clearance around the extremity of the liner for the escape of air in the zone last to be filled by the plastic entering the parison mold.
  • the blow core 12 is removed from the parison mold together with neck ring 14 and with the parison thereon. It is next inserted into the blow mold 40 as shown in FIG. 6. As the next step, pressure fluid, usually compressed air, is admitted through fluid passages 41 and the parison is expanded into the blow mold 40 to assume the shape of the blow mold cavity 42, as indicated by dotted lines in FIG. 6. Fluid pressure is maintained until the blown article cools sufficiently in contact with the walls of the blow mold 40 to be removed therefrom to provide composite container 44. It can be seen that the air removal of the present invention and the conforming of the liner to the core offers considerable advantages in the uniformity of product upon subsequent expansion.
  • pressure fluid usually compressed air
  • the composite parison may be heated to the proper temperature prior to the blowing operation.
  • the parison may be kept under internal pressure during the heating step and until the blowing of the same into the form of the finished article is completed.
  • the parison may be maintained under internal fluid pressure or may be placed on a suitable support such as a stem which fits closely therein. Such reheating is usually unnecessary if the parison is transferred on the blow core into the blow mold before cooling to a temperature below that at which the blowing step can be efficiently carried out.
  • a composite container is produced consisting of more than one layer, in which the layers are in full conformance with each other, but not necessarily bonded, such as by welding or chemically, and in which such conformance is maintained primarily by the atmospheric pressure acting upon the layers.
  • each of the layers preserves its mechanical properties independent of the other.
  • the liner is ductile and the outer layer brittle, a force and deformation sufficient to cause a crack in said outer layer will not necessarily rupture the liner as well.
  • many containers are subject to mechamical damage, such as during filling and transport, while containing liquids or pastelike substances. The ability of the liner to remain whole during such damage, even if the outer layer should break, prevents spillage and consequent damage to filling and transportaion apparatus.
  • the composite article thus produced is characterized by layers having different physical properties which are so disposed that the respective properties may fully benefit the finished article without one of the layers detracting from the properties of another layer.
  • the outer layer may be of relatively substantial thickness and made of a strong and inexpensive plastic, such as polystyrene or linear polyethylene. While having sufficient strength to serve as a holder and protector for the inner layer so long as the latter in fully conformed thereto, as by avoidance of air entrapment between the layers, such outer layer will have limited capability to blend or otherwise deform and may exhibit a degree of brittleness.
  • the inner layer is usually very thin and film-like, made of a plastic design to protect the contents, such as against oxidation, or to protect the outer layer, such as against solvent attack.
  • Such inner layer may, for example, be made of an acrylonitrile polymer, or of polyvinylidine chloride, or polyethylene film and may accordingly exhibit limited strength, but substantially greater impact resistance than the outer layer.
  • the inner layer while relatively thin, can be self-sustaining and hold the contents of the container, particularly when backed by the relatively thick outer layer. Even though the outer layer may be somewhat brittle and tend to produce cracks when damaged, such defects are not passed through to the self-supporting inner layer which is backed by the outer layer but is not bonded thereto over its entire extent.
  • the relative brittleness of the outer layer leaves the inner layer unaffected and the flexibility of the inner layer is not impaired by the fact that the outer layer can participate in deflection and bending only to a limited extent.
  • the selection of the properties of the total composite article is facilitated because the individual layers can be made to preserve their individual properties, as desired, and measures may be taken to avoid damage to at least one of the layers during their combined use.
  • the preformed sleeve and the pressure molded layer are subjected to heating and cooling in accordance with the temperatures at which the various operations are carried out. Therefore, the layers will expand and contract to a degree corresponding to the respective temperatures, in keeping with the expansion characteristic of the respective materials. Should the outer layer expand more than the inner layer, or should the inner layer contract more than the outer layer, then separation of the layers would tend to occur. Normally, the tendency to separate due to such differences in expansion properties will be counteracted by atmospheric pressure only if the difference between the expansions or contractions of the layers is minimal.
  • thermal expansion coefficient is not by itself sufficient to define the contraction behavior of a molded article in the course of its molding operation.
  • the latter contraction is usually termed “mold shrinkage”, denoting that amount by which a unit length of said article decreases as the article is molded, i.e., while it transgresses the temperature range from that of the molten plastic furnished to the mold under pressure to that of the finished, cooled article.
  • Mold shrinkage depends not only on the thermal expansion coefficient, but also on the conditions of molding, for example, the temperature of the molten plastic, the rate of filling of the mold and the mechanical constraints given by the mold together with the rate of cooling therein.
  • the molding process in addition to the process which avoids air entrapment in order to render cohesion by atmospheric pressure effective, is conducted in such a manner that the total shrinkage of the pressure molded layer exceeds that of the liner at all times, even when the thermal expansion coefficient of the liner exceeds that of the pressure molded layer.
  • This can be accomplished by means of appropriate adjustment of the melt temperature and by corresponding temperature control of the core and of the blow mold. It can be recognized that this is a significant advantage.
  • thermal expansion coefficients usually reported in tables, such as the one referred to above are accurate only within a limited range of temperature. In the range of elevated temperatures, particularly also those during the molten condition, the respective coefficients are at considerable variance therefrom, as is well known in the literature.
  • plastics that remain substantially amorphous experience a major change in contraction characteristics when cooled from the viscous liquid to the glossy state, i.e., while transgressing the so-called hardening (or, in reverse, the softening) point, as for example described on pp. 120 to 123 of Mechanical Behavior of High Polymers, by Turner Alfrey, Jr., published by Interscience Publishers, New York, 1948.
  • a major change occurs in crystalline plastics when they transgress from the viscous-liquid to the crystalline state.
  • the blow core and the pressure molded outer layer necessarily heats the liner to a temperature that renders it capable of deformation by stretching or blowing.
  • the plastic of the outer layer is itself heated to a temperature sufficient to render it capable of being pressure molded.
  • the latter temperature is in most instances, but not necessarily always, higher than the former. It will be understood that neither temperature is limited to a single, specific value in any given molding process. Instead, a reasonable range may always be accommodated. For example, blowing of the liner will usually succeed within a temperature range of ⁇ 10° F. and pressure molding with a range of ⁇ 20° F.
  • the pressure molding temperature is chosen in such a manner that the outer layer will contract to a greater degree than the liner and thereby place the liner under compression at all stages of the process.
  • advantage may be taken, in combination, of the thermal contraction of the pressure molded layer, including the one in transition from the viscous, i.e., fluid, to solid state as it cools in the parison mold, but mostly in the blow mold, and also of the fact that the said layer so contracts over a substantially greater temperature range (and therefore to a greater extent) than the liner.
  • the liner needs to be heated only enough to be deformed in the solid, non-fluid condition.
  • the liner is under compression in the parison as well as in the stretched or blown article. Therefore, in the simultaneous absence of air between layers, as described herein, separation of the layers is virtually impossible, except by deliberate means.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US05/718,689 1973-07-02 1976-08-30 Composite plastic container Expired - Lifetime US4079851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/375,824 US4013748A (en) 1971-12-30 1973-07-02 Method for making composite plastic article

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US05/375,824 Division US4013748A (en) 1971-12-30 1973-07-02 Method for making composite plastic article

Publications (1)

Publication Number Publication Date
US4079851A true US4079851A (en) 1978-03-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
US05/718,689 Expired - Lifetime US4079851A (en) 1973-07-02 1976-08-30 Composite plastic container

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US (1) US4079851A (en])
JP (2) JPS5054659A (en])
AU (1) AU471262B2 (en])
BE (1) BE817017R (en])
CA (1) CA1037676A (en])
CH (1) CH565647A5 (en])
DE (1) DE2431539B2 (en])
FR (1) FR2235787B2 (en])
GB (1) GB1430055A (en])
IT (1) IT1053457B (en])

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4427122A (en) 1977-05-13 1984-01-24 Platmanufaktur A.B. Container for liquids, which are sensitive to light
WO1984001352A1 (en) * 1982-09-29 1984-04-12 Nat Can Corp Multiwalled container and method of making same
US4797244A (en) * 1982-09-29 1989-01-10 American National Can Company Multiwalled container and method of making same
US4993585A (en) * 1989-01-12 1991-02-19 Mcmahon William Encapsulated case edging
US5360143A (en) * 1993-04-29 1994-11-01 The Dow Chemical Company Lined hopper for storing solids
US5443766A (en) * 1993-09-10 1995-08-22 Plastipak Packaging, Inc. Method of making multi-layer preform used for plastic blow molding
US5464106A (en) * 1994-07-06 1995-11-07 Plastipak Packaging, Inc. Multi-layer containers
US5508076A (en) * 1994-02-10 1996-04-16 Electra Form, Inc. Layered preform
US5678711A (en) * 1996-03-08 1997-10-21 Graham Packaging Corporation Preform and hot-fill blow-molded container having reinforced finish
US6090337A (en) * 1997-07-30 2000-07-18 Plastipak Packaging, Inc. Method for making multi-layer plastic preform for blow molding
US6312641B1 (en) 1997-10-17 2001-11-06 Plastic Fabrication Technologies Llc Method of making containers and preforms incorporating barrier materials
EP1058653A4 (en) * 1998-02-24 2001-12-05 Plastipak Packaging Inc LINING AND PREFORM
US6352426B1 (en) 1998-03-19 2002-03-05 Advanced Plastics Technologies, Ltd. Mold for injection molding multilayer preforms
US6391408B1 (en) 1997-10-17 2002-05-21 Advanced Plastics Technologies, Ltd. Coated polyester preforms and method of making same
US6461697B1 (en) 1993-09-10 2002-10-08 Plasipak Packaging, Inc. Polyethylene terephthalate multi-layer preform used for plastic blow molding
US20040151937A1 (en) * 2002-11-08 2004-08-05 Hutchinson Gerald A. Injection mold having a wear resistant portion and a high heat transfer portion
US6808820B2 (en) 2000-09-05 2004-10-26 Advanced Plastics Technology Ltd. Multilayer containers and preforms having barrier properties utilizing recycled material
US20050136201A1 (en) * 2003-12-22 2005-06-23 Pepsico, Inc. Method of improving the environmental stretch crack resistance of RPET without solid stating
US20050142311A1 (en) * 2003-12-24 2005-06-30 Nahill Thomas E. Finish assembly for a plastic container or preform
US20060051451A1 (en) * 2004-06-10 2006-03-09 Hutchinson Gerald A Methods and systems for controlling mold temperatures
US20060065992A1 (en) * 2004-04-16 2006-03-30 Hutchinson Gerald A Mono and multi-layer articles and compression methods of making the same
US20070108668A1 (en) * 2005-08-30 2007-05-17 Hutchinson Gerald A Methods and systems for controlling mold temperatures
US20070194029A1 (en) * 2002-03-15 2007-08-23 Graphic Packaging International, Inc. Container having a rim or other feature encapsulated by or formed from injection-molded material
US20070228074A1 (en) * 2006-04-03 2007-10-04 Mueller Edward L Spray bottle neck finish
US20070262487A1 (en) * 2006-03-10 2007-11-15 Graphic Packaging International, Inc. Injection-molded composite construct
US20070267374A1 (en) * 2002-10-08 2007-11-22 Graphic Packaging International, Inc. Container Having a Rim or other Feature Encapsulated by or Formed From Injection-Molded Material
US7588808B2 (en) 2004-04-16 2009-09-15 Advanced Plastics Technologies Luxembourg S.A. Mono and multi-layer articles and injection molding methods of making the same
US20100314801A1 (en) * 2007-12-31 2010-12-16 O'hagan Brian R Tool for forming construct
US20110065556A1 (en) * 2002-03-15 2011-03-17 Graphic Packaging International, Inc. Container Having A Rim Or Other Feature Encapsulated By Or Formed From Injection-Molded Material
US20120132607A1 (en) * 2009-07-03 2012-05-31 Heineken Supply Chain B.V. Container, preform assembly and method and apparatus for forming containers
US8252217B2 (en) 2008-04-04 2012-08-28 Graphic Packaging International, Inc. Container with injection-molded feature and tool for forming container
US8464894B2 (en) 2007-12-28 2013-06-18 Graphic Packaging International, Inc. Injection-molded composite construct and tool for forming construct
US8858858B2 (en) 2002-03-15 2014-10-14 Graphic Packaging International, Inc. Method of forming container with a tool having an articulated section
WO2018098564A1 (en) * 2016-12-02 2018-06-07 Husky Injection Molding Systems Ltd. Mold stack for a preform
US11084626B2 (en) 2015-02-27 2021-08-10 Graphie Packaging International, LLC Method of forming a container

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781551A (en) * 1952-01-05 1957-02-19 Louis J Richerod Method of making hollow containers
US3140004A (en) * 1960-12-02 1964-07-07 Owens Illinois Glass Co Hollow plastic containers
US3144167A (en) * 1961-07-19 1964-08-11 American Can Co Foamed plastic containier
US3247550A (en) * 1962-04-18 1966-04-26 Jr Raymond Haines Apparatus for molding composite plastic products
US3409710A (en) * 1965-01-19 1968-11-05 Continental Can Co Method of molding dual wall container and closure
US3869056A (en) * 1970-09-14 1975-03-04 Emery I Valyi Multilayered hollow plastic container

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781551A (en) * 1952-01-05 1957-02-19 Louis J Richerod Method of making hollow containers
US3140004A (en) * 1960-12-02 1964-07-07 Owens Illinois Glass Co Hollow plastic containers
US3144167A (en) * 1961-07-19 1964-08-11 American Can Co Foamed plastic containier
US3247550A (en) * 1962-04-18 1966-04-26 Jr Raymond Haines Apparatus for molding composite plastic products
US3409710A (en) * 1965-01-19 1968-11-05 Continental Can Co Method of molding dual wall container and closure
US3869056A (en) * 1970-09-14 1975-03-04 Emery I Valyi Multilayered hollow plastic container

Cited By (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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FR2235787B2 (en]) 1976-12-24
JPS5054659A (en]) 1975-05-14
DE2431539B2 (de) 1978-10-05
GB1430055A (en) 1976-03-31
AU7064174A (en) 1976-01-08
JPS50140570A (en]) 1975-11-11
DE2431539A1 (de) 1975-01-23
FR2235787A2 (en]) 1975-01-31
CA1037676A (en) 1978-09-05
IT1053457B (it) 1981-08-31
CH565647A5 (en]) 1975-08-29
BE817017R (fr) 1974-10-16
AU471262B2 (en) 1976-04-15

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